F04C 21/00
Oscillating-piston pumps specially adapted for elastic fluids
F04C21/00 (Oscillating-piston pumps specially adapted for elastic fluids) appears on 36 US grants and 35 published applications in this corpus.
Search patents in F04C- Granted patents
- 36
- Published applications
- 35
- Assignees
- 26
- Inventors
- 62
- Latest grant
- 13 Feb 2024
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 2 |
| 2008 | 1 | 2 |
| 2009 | 0 | 0 |
| 2010 | 1 | 1 |
| 2011 | 1 | 3 |
| 2012 | 0 | 0 |
| 2013 | 0 | 4 |
| 2014 | 2 | 1 |
| 2015 | 3 | 1 |
| 2016 | 2 | 0 |
| 2017 | 1 | 6 |
| 2018 | 0 | 3 |
| 2019 | 3 | 6 |
| 2020 | 6 | 3 |
| 2021 | 2 | 2 |
| 2022 | 3 | 1 |
| 2023 | 2 | 0 |
| 2024 | 1 | 0 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Package type fluid machine13 Feb 2024US 11,898,544 B2Hitachi Industrial Equipment Systems Co., Ltd.
- Piston machine, modular construction system for a piston machine, and method for producing a piston machine26 Dec 2023US 11,852,017 B2RapSon GmbH
- Multi-chamber compressor of mechanical vapor re-compression and water treatment methods4 Jul 2023US 11,691,895 B2
- Method and device for expanding a gas with a reciprocating-piston machine6 Dec 2022US 11,519,267 B2Burckhardt Compression AG
- Rotational displacement apparatus9 Aug 2022US 11,408,286 B2Fetu Limited
- Piston machine, modular construction system for a piston machine, and method for producing a piston machine3 Feb 2022US 2022/0034226 A1RapSon GmbH
- Package Type Fluid Machine15 Jul 2021US 2021/0215147 A1Hitachi Industrial Equipment Systems Co., Ltd.
- Miniature optical particulate matter sensor module21 Jan 2021US 2021/0018421 A1Honeywell International Inc.
- Multi-Chamber Compressor Of Mechanical Vapor Re-Compression And Water Treatment Methods29 Oct 2020US 2020/0339439 A1
- Method and device for expanding a gas with a reciprocating-piston machine28 May 2020US 2020/0166036 A1Burckhardt Compression AG
Most cited
By later US patents
- Ventilator for assisting the breathing of a patient26US 5,086,767 ACanadian Aging & Rehabilitation Product Development Corporation · 1992
- Scroll compressor with captured thrust washer13US 9,080,446 B2BITZER Kuehlmaschinenbau GmbH · 2015
- Electric compressor9US 4,472,114 ATokyo Shibaura Denki Kabushiki Kaisha · 1984
- Pivotal piston machine8US 4,272,229 AWABCO Westinghouse GmbH · 1981
- Ultra-low friction air pump for creating oscillatory or pulsed jets8US 7,980,516 B2The Boeing Company · 2011